This is the Greek letter "delta", 'δ'. I have made this product, because I think it is really valuable in capturing the Greek letter. This model can be used as jewelry, necklace, or many other things. I think that this model is best resembles a souvenir, because it can be used as a gift. It is appropriate for any occasion and holiday event. I tried making this model as cheap as I can, so customers can afford it. I allowed all the materials possible for this model, this way the customer can have a greater freedom of choosing a specific material that most suits his/hers needs and desires. If you have any question, send me a private message.